Combined end plate and precast pile thereof

Abstract

The utility model provides a combined type end plate and a precast pile thereof, a first through hole is arranged on the end plate, the first through hole comprises a large aperture section and a small aperture section, a sleeve is arranged on one side of the end plate close to the large aperture section, a step hole is arranged in the sleeve, and the step hole and the first through hole are coaxially arranged. The first through hole is a counterbore and is communicated with the end plate rib penetrating hole through the end plate rib passing groove. The side face of the sleeve is provided with an axially-through sleeve rib passing groove. According to the utility model, the coaxial steel bars are respectively butted in the mounting holes of the end plates and the sleeves, so that a plurality of sections of piles can be produced in the production process.

Description

Technical Field

[0001] The utility model relates to the production field of prefabricated piles, in particular to a combined end plate and a prefabricated pile thereof. Background Art

[0002] Precast piles are widely used in industrial and civil construction, water conservancy, water transportation, highway and other engineering construction fields. The pile length is determined according to structural characteristics, stress and other factors. Due to the influence of transportation conditions, manufacturer's lifting equipment and on-site lifting conditions, the length of a single precast pile for land transportation does not exceed 20m, and is generally within 15m. Therefore, for projects exceeding this length, they need to be connected through multi-section piles. In this case, the allocation of different pile lengths will be involved. At the same time, for retaining piles in slope projects, the pile length is determined by the retaining height, geological conditions and structural type. According to engineering experience, the shortest length is about 3m and the maximum length is about 30m, with various length specifications.

[0003] Precast pile manufacturers need to prepare molds of various lengths to meet project requirements, which inadvertently increases manufacturing costs and results in a significant waste of resources. Using long molds to produce multi-section short piles not only reduces mold investment but also improves production efficiency. Currently, there are two main methods for producing non-standard pile lengths using long molds in pipe pile production: one is to use a pile connector. Existing pile connectors consist of two half-clamps. A connecting plate is attached to the end plates of the reinforcement cages of the two connected piles. The connecting plate is clamped within the half-clamp to connect the two adjacent reinforcement cages. In actual production, the assembly and disassembly process of the pile connector is cumbersome, requiring extensive storage space, which seriously affects work efficiency. Furthermore, the two connecting plates are prone to grout leakage, making it difficult to separate the pile sections. The other method is to use a custom end plate with double countersunk holes. This means a countersunk head is placed on each side of the tensioning hole, with the countersunk heads facing opposite directions. The steel rods of the two piles pass through the tensioning hole and are then directed to their respective countersunk holes. After demolding and curing, the steel rods are sawed off on one side of the end plate to produce multi-section pipe piles.

[0004] In summary, the pile connector has low efficiency and high labor costs. The prior art discloses an end plate with a bidirectional countersunk hole, in which two main bars are respectively stuck in the two countersunk holes. The technical idea is novel and efficient, but it is only applicable to pipe piles or other piles that are symmetrical about any axis relative to the centroid. For piles with other cross-sectional forms, especially special-shaped piles, the rotation of the steel cage will cause the position of the main bars to change, resulting in insufficient concrete protection layer or even exposed bars. The head and tail plates are conventional end plates, which will also cause the steel cage to twist. Therefore, it has certain limitations. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present utility model provides a combined end plate and a precast pile thereof. A sleeve is provided on the mounting hole of the end plate, and coaxial steel bars are respectively butted in the mounting hole of the end plate and the sleeve, so that multiple sections of piles can be produced during the production process.

[0006] The present utility model achieves the above technical purpose through the following technical means.

[0007] A combined end plate, wherein the end plate is provided with a first through hole, the first through hole includes a large-diameter section and a small-diameter section, the sleeve is arranged on one side of the end plate close to the large-diameter section, a stepped hole is arranged in the sleeve, and the stepped hole is coaxially arranged with the first through hole.

[0008] Furthermore, the first through hole is a countersunk hole, and the first through hole is communicated through a reinforcing bar groove on the end plate and a reinforcing bar through hole on the end plate.

[0009] Furthermore, an axially penetrating reinforcing bar groove is formed on the side surface of the sleeve.

[0010] Furthermore, the opening direction of the reinforcing bar groove on the sleeve is the same as that of the reinforcing bar groove on the end plate.

[0011] Furthermore, the sleeve is a cuboid, and the sleeve further includes a reinforcing bar through hole and a reinforcing bar groove on the sleeve. The reinforcing bar through hole on the sleeve and the stepped hole are communicated through the reinforcing bar groove on the sleeve.

[0012] Furthermore, the reinforcing bar groove on the sleeve is a stepped groove, including a first stepped stage and a second stepped stage close to the end plate side. The width of the first stepped stage is greater than the width of the second stepped stage.

[0013] Furthermore, the height of the first stepped stage is greater than the height of the enlarged head of the steel bar.

[0014] Furthermore, the first stepped surface between the first stepped stage and the second stepped stage is not lower than the second stepped surface of the stepped hole.

[0015] Furthermore, the reinforcing bar groove on the end plate is a T-shaped structure.

[0016] Furthermore, the sleeve and the end plate are connected by welding or threaded connection or clamping connection.

[0017] Furthermore, a sleeve positioning groove is provided on the end plate.

[0018] A precast pile, at least one end of the pile body of the precast pile is provided with the above-mentioned combined end plate.

[0019] The beneficial effects of the present utility model are as follows:

[0020] 1. The combined end plate described in the present utility model is provided with a sleeve on the mounting hole of the end plate. Coaxial steel bars can be butted in the mounting hole of the end plate and the sleeve respectively. Multiple sections of piles can be produced during the production process, ensuring that the main steel bars of each section of the pile are on the same straight line, avoiding problems such as eccentric tensioning and insufficient steel bar cover, and being applicable to various pile types such as circular, semi-circular, square, and rectangular piles.

[0021] 2. The combined end plate described in the present utility model has a simple sleeve structure, can be processed with round bars of the same diameter or plates of the same thickness, has less waste, and a high material utilization rate; the sleeve has a small size, light weight, low labor intensity, and no concern about material stacking.

[0022] 3. The combined end plate described in the present utility model is provided with a positioning groove on the surface of the end plate, which can assist in quickly positioning the sleeve.

[0023] 4. For the combined end plate described in the present utility model, compared with a circular sleeve, the sleeve is a cuboid. The rectangular sleeve has no holes on its side, and the stress concentration effect is better than that of the circular sleeve; the perimeter of the rectangular sleeve is larger, and the calculated size of the weld leg of the weld is smaller than that of the circular sleeve; the area of the rectangular sleeve is larger than that of the circular sleeve, and under the same tensile strength, the strength of the required steel is lower than that of the circular sleeve.

[0024] 5. The production method of the multi-section pile described in the present utility model is to add a combined end plate between two steel cages, and through cutting, form multi-section precast piles with end plates, simplifying the existing production process.

[0025] 6. The production method of the multi-section pile described in the present utility model is that the length of the sleeve upsetting hole (i.e., the first stage) is slightly larger than the height of the main steel bar upset head. When installing, first install the main steel bar directly connected to the end plate, and then the main steel bar connected to the sleeve, which can strictly control the gap between the two main steel bar upset heads, prevent the main steel bar from popping out of the counterbore during the hoisting process of the cage, and thus avoid the cage from falling apart and repeated installation operations.

[0026] 7. The production method of the multi-section pile described in the present utility model is that during the production and demolding of the precast pile, there is no disassembly and assembly of external connectors. Compared with the production of conventional precast piles, there are no new processes and the production efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. The following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, it is obvious that other drawings can also be obtained according to these drawings.

[0028] Figure 1 It is an exploded view of the combined end plate described in the present utility model.

[0029] Figure 2 Partial cross-sectional view of the combined end plate according to the present utility model.

[0030] Figure 3 3D view of the sleeve in Embodiment 1 of the present utility model.

[0031] Figure 4 Top view of the sleeve in Embodiment 1 of the present utility model.

[0032] Figure 5 Cross-sectional view of the sleeve in Embodiment 1 of the present utility model.

[0033] Figure 6 3D view of the sleeve in Embodiment 2 of the present utility model.

[0034] Figure 7 Partial 3D view of the end plate in Embodiment 2 of the present utility model.

[0035] Figure 8 3D view of the sleeve in Embodiment 3 of the present utility model.

[0036] Figure 9 Top view of the sleeve in Embodiment 3 of the present utility model.

[0037] Figure 10 Cross-sectional view of the sleeve in Embodiment 3 of the present utility model.

[0038] Figure 11 Front view of the assembly of the sleeve in the circular end plate in Embodiment 3 of the present utility model.

[0039] Figure 12 3D view of the end plate according to the present utility model.

[0040] Figure 13 Front view of the end plate according to the present utility model.

[0041] Figure 14 Top view of the end plate according to the present utility model.

[0042] Figure 15 Cutting schematic diagram during the production process of the multi-section pile according to Embodiment 5 of the present utility model.

[0043] Figure 16 Cutting schematic diagram during the production process of the multi-section pile according to Embodiment 6 of the present utility model.

[0044] In the figure:

[0045] 1 - First steel bar; 2 - Sleeve; 2-2 - Step hole; 2-2-1 - Step surface; 2-3 - Sleeve rib passing groove; 2-3-1 - First stage; 2-3-2 - Second stage; 2-3-4 - Step surface; 2-4 - Sleeve steel bar passing hole; 3 - End plate; 3-1 - Positioning groove; 3-2 - First through hole; 3-2-1 - Large aperture section; 3-2-2 - Small aperture section; 3-3 - End plate rib passing groove; 3-4 - End plate steel bar passing hole; 4 - Second steel bar; 5 - First steel cage; 6 - Second steel cage; 7 - Conventional end plate. Detailed implementation manners

[0046] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0047] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0048] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0049] Such as Figure 1 And Figure 2As shown in the figure, for the combined end plate of the present utility model, a number of first through holes 3-2 for placing the ends of the second reinforcing bars 4 are evenly distributed on the end plate 3. The first through holes 3-2 include a large-diameter section 3-2-1 and a small-diameter section 3-2-2, and the diameter of the large-diameter section 3-2-1 is greater than that of the small-diameter section 3-2-2. A sleeve 2 connected to the end plate 3 is correspondingly provided above each first through hole 3-2. The sleeve 2 is arranged on one side of the end plate close to the large-diameter section 3-2-1. A stepped hole 2-2 is provided in the sleeve 2, and the stepped hole 2-2 is coaxially arranged with the first through hole 3-2. The end of the first reinforcing bar 1 is placed in the sleeve 2, so that the second reinforcing bar 4 and the first reinforcing bar 1 are on the same axis. By butting the coaxial reinforcing bars in the mounting holes of the end plate and the sleeve respectively, multi-section piles can be produced during the production process, ensuring that the main reinforcing bars of each section of the pile are on the same straight line, and problems such as eccentric tensioning and insufficient reinforcing bar cover can be avoided. The outer shape of the end plate 3 in the present utility model can be circular, rectangular or special-shaped. The ends of the first reinforcing bar 1 or the second reinforcing bar 4 can be the ends of conventional reinforcing bars, and the ends can also represent the enlarged heads or upset heads of the reinforcing bars.

[0050] Embodiment 1

[0051] The first embodiment of the sleeve is as Figure 3 、 Figure 4 and Figure 5 shown. The sleeve 2 is cylindrical. A stepped hole 2-2 is provided in the sleeve 2 for clamping the first reinforcing bar 1. A sleeve reinforcing bar through groove 2-3 that can penetrate the side surface along the center is provided on the sleeve 2. The opening direction of the sleeve reinforcing bar through groove 2-3 is the same as that of the end plate reinforcing bar through groove 3-3. During assembly, after the upset head of the reinforcing bar clamped by the end plate 3 penetrates through the reinforcing bar through hole 3-4 of the end plate 3, the end of the reinforcing bar is higher than the surface of the end plate 3. At this time, the upset head of the reinforcing bar needs to move from the sleeve reinforcing bar through groove 2-3 to the end plate counterbore 3-2. The sleeve reinforcing bar through groove 2-3 is a stepped groove, including a first stepped stage 2-3-1 and a second stepped stage 2-3-2 close to the end plate. The width of the first stepped stage 2-3-1 is greater than that of the second stepped stage 2-3-2. The height of the first stepped stage 2-3-1 is greater than the height of the end of the reinforcing bar. When threading the reinforcing bar, after the reinforcing bar penetrates through the through groove, the upset head moves from the through groove to the stepped hole 2-2. The first stepped surface 2-3-4 between the first stepped stage 2-3-1 and the second stepped stage 2-3-2 is not lower than the second stepped surface 2-2-1 of the stepped hole, preventing eccentricity during tensioning and causing the reinforcing bar to be eccentric towards the through groove direction.

[0052] The stepped hole 2-2 is coaxially arranged with the first through hole 3-2 of the end. The depth of the stepped hole 2-2 is greater than the height of the end of the first reinforcing bar 1.

[0053] As Figure 12 、 Figure 13 and Figure 14As shown in the figure, the end plate 3 is square. Each first through hole 3-2 on the end plate 3 is a counterbore. The first through hole 3-2 communicates with the end plate rib through hole 3-4 through the end plate rib groove 3-3. The first through hole 3-2 and the sleeve counterbore 2-1 are on the same axis and are aligned along the installation surface. The hole depth of the large-diameter section 3-2-1 in the first through hole 3-2 is greater than the upset height of the second steel bar 4. The upper end surface of the stepped hole 2-2 in contact with the sleeve 2 is provided with a positioning groove 3-1. The positioning groove 3-1 matches the outer contour size of the sleeve 2 and is used to position the sleeve 2. The depth of the positioning groove 3-1 is 1 to 2 mm. A welding groove is provided on the outer contour of the end plate 3 on one side of the large-diameter section 3-2-1 of the end plate counterbore 3-2.

[0054] In Embodiment 1, the stepped hole 2-2 is aligned with the first through hole 3-2, and the counterbore directions of the stepped hole 2-2 and the first through hole 3-2 are opposite, that is, the counterbore of the stepped hole 2-2 is opposite to the counterbore of the first through hole 3-2, as Figure 2 shown. Both the end plate 2 and the sleeve 3 are made of steel. In Embodiment 1, the end plate 3 can also be circular.

[0055] On the basis of Embodiment 1, in Embodiment 2, the sleeve rib through groove 2-3 on the sleeve 2 is a straight groove, that is, it is not the stepped groove in Embodiment 1, as Figure 6 shown. Corresponding to Embodiment 2, the end plate rib through groove 3-3 is a T-shaped structure and can be regarded as a stepped groove. The first through hole 3-2 communicates with the end plate rib through hole 3-4 through the T-shaped end plate rib through groove 3-3, as Figure 7 shown. The end plate rib through groove is a T-shaped structure, which is convenient for the upset of the steel bar connected to the end plate to move from the end plate rib through hole 3-4 to the end plate counterbore 3-3.

[0056] Embodiment 3

[0057] On the basis of Embodiment 1, in Embodiment 3, the sleeve 2 is a cuboid and the end plate 3 is circular.

[0058] As Figure 8 、 Figure 9 and Figure 10As shown in the figure, the sleeve 2 is a cuboid. Sleeve through-rib holes 2-4 and step holes 2-2 are respectively provided on the sleeve 2. The sleeve through-rib holes 2-4 and the step holes 2-2 are communicated through a sleeve rib-through groove 2-3. The opening direction of the sleeve rib-through groove 2-3 is the same as that of the end plate rib-through groove 3-3. The sleeve rib-through groove 2-3 is a step groove, including a first step stage 2-3-1 and a second step stage 2-3-2 on the side close to the end plate. The width of the first step stage 2-3-1 is greater than that of the second step stage 2-3-2. The sleeve rib-through groove 2-3 is a step groove, including a first step stage 2-3-1 and a second step stage 2-3-2 on the side close to the end plate. The width of the first step stage 2-3-1 is greater than that of the second step stage 2-3-2. The height of the first step stage 2-3-1 is greater than the height of the steel bar end. The first step surface 2-3-4 between the first step stage 2-3-1 and the second step stage 2-3-2 is not lower than the second step surface 2-2-1 of the step hole.

[0059] As Figure 11 shown in the figure, a number of first through holes 3-2 are evenly distributed in the circumferential direction on the end plate 3. Each first through hole 3-2 is a counterbore. The first through holes 3-2 and the end plate through-rib holes 3-4 are communicated through an end plate rib-through groove 3-3. A square positioning groove 3-1 is provided on the upper end surface of the step hole 2-2 in contact with the sleeve 2. The rectangular sleeve 2 is positioned in the positioning groove 3-1 so that the step hole 2-2 is aligned with the end plate counterbore 3-2. After the end plate rib-through groove 3-3 and the sleeve rib-through groove 2-3 are aligned, the rectangular sleeve 2 and the end plate 3 are welded.

[0060] On the basis of Embodiment 2, in Embodiment 4, the sleeve 2 is a cuboid and the end plate 3 is circular.

[0061] For the precast pile of the present invention, at least one of the combined end plates of the present invention is installed at one end of the pile body of the precast pile.

[0062] The production method of the multi-section pile of the present utility model includes the following steps:

[0063] Manufacture a steel cage assembly; manufacture the combined end plate as described above; there is at least one steel cage in the steel cage assembly. The steel cage assembly includes a plurality of steel cages. Adjacent two steel cages are butted through the combined end plate. One end of a steel cage is connected in the first through hole 3-2 of the end plate, and another adjacent steel cage is installed in the step hole of the sleeve 2 to form a series-connected steel cage assembly; the lengths of the plurality of steel cages in the steel cage assembly can be the same or different.

[0064] Produce a precast pile through a mold;

[0065] After the precast pile reaches the design strength, saw the pile at the combined end plate to form several sections of piles.

[0066] Example 5 is as follows Figure 15 As shown, taking the production of three - section piles as an example, the production method of multi - section piles is specifically described, including the following steps:

[0067] S01: Prepare two groups of steel reinforcement cages, namely the first steel reinforcement cage 5 and the second steel reinforcement cage 6. The length of the second steel reinforcement cage 6 is twice that of the first steel reinforcement cage 5.

[0068] S02: Prepare a conventional end plate 7 and the combined end plate of the present invention.

[0069] S03: Install the conventional end plate 7 at the A - end of the first steel reinforcement cage 5. The steel bar ends at the B - end of the first steel reinforcement cage 5 pass through the end - plate bar - passing holes 3 - 4, and are located in the first through - hole 3 - 2 after passing through the end - plate bar - passing grooves 3 - 3; install the conventional end plate 7 at the D - end of the second steel reinforcement cage 6. The steel bar ends at the C - end of the second steel reinforcement cage 6 pass through the sleeve bar - passing holes 2 - 4, and are located in the stepped hole 2 - 2 after passing through the sleeve bar - passing grooves 2 - 3.

[0070] S04: On one side of the combined end plate close to the A - end of the first steel reinforcement cage 5, paste a partition mark along the outer edge. The partition mark can be made of materials such as double - sided foam tape or foam board.

[0071] S05: Lift the steel reinforcement cage into the mold, install the head and tail plates. The mold has been sprayed with a release agent.

[0072] S06: Normal production process: During centrifugal production, in sequence, perform mold closing, prestress tensioning, pumping concrete, centrifugal forming, pouring out the remaining slurry, steam curing, demolding, autoclave curing or natural curing (when not pumping, first pour the concrete and then perform prestress tensioning, then close the mold, and the remaining processes are the same); during casting production, in sequence, perform concrete casting, steam curing, demolding, autoclave curing or natural curing.

[0073] S07: After reaching the design strength, saw the pile along the partition mark to form AB pile and CD pile. Then saw CD pile in the middle to form 3 precast piles with the same length, namely AB pile, CE pile and ED pile. AB pile, CE pile and ED pile have the same length and one end has an end plate.

[0074] Example 6 is as follows Figure 16 As shown, taking the production of four - section piles as an example, the production method of multi - section piles is specifically described, including the following steps:

[0075] S01: Prepare three groups of steel reinforcement cages, namely 2 first steel reinforcement cages 5 and 1 second steel reinforcement cage 6. The length of the second steel reinforcement cage 6 is twice that of the first steel reinforcement cage 5.

[0076] S02: Prepare a conventional end plate 7 and the combined end plate of the present invention.

[0077] S03: At the A end of a first steel cage 5, a conventional end plate 7 is installed. The steel bar ends at the B end of the first steel cage 5 pass through the end plate rebar holes 3-4, and after passing through the end plate rebar grooves 3-3, they are located in the first through holes 3-2. The steel bar ends at the C end of another first steel cage 5 pass through the sleeve rebar holes 2-4, and after passing through the sleeve rebar grooves 2-3, they are located in the stepped holes 2-2. In this way, 2 first steel cages 5 form a steel cage assembly. One end (i.e., the A end) of the steel cage assembly is installed with a conventional end plate 7.

[0078] S04: The steel bar ends at the other end (i.e., the D end of another first steel cage 5) of the steel cage assembly pass through the end plate rebar holes 3-4, and after passing through the end plate rebar grooves 3-3, they are located in the first through holes 3-2. At the G end of the second steel cage 6, a conventional end plate 7 is installed. The steel bar ends at the E end of the second steel cage 6 pass through the sleeve rebar holes 2-4, and after passing through the sleeve rebar grooves 2-3, they are located in the stepped holes 2-2. In this way, the steel cage assembly and the second steel cage 6 form a whole.

[0079] S04: On one side of the combined end plate, partition marks are pasted along the outer edge. The partition marks can be made of materials such as double-sided foam tape or foam board. Figure 14 It can be seen that the partition marks are located at the B end and the D end.

[0080] S05: The whole steel cage is lifted into the mold, and the head and tail plates are installed. The mold has been sprayed with mold release agent.

[0081] S06: Normal production process: During centrifugal production, the mold is closed, prestressed tensioning, pumped concrete, centrifugal forming, pouring out the surplus slurry, steam curing, demolding, autoclave curing or natural curing are carried out in sequence. (When it is not pumped, the concrete is poured first and then the prestressed tensioning is carried out, and then the mold is closed, and the remaining processes are the same). During casting production, concrete pouring, steam curing, demolding, autoclave curing or natural curing are carried out in sequence.

[0082] S07: After reaching the design strength, saw the pile along the partition marks to form AB piles, CD piles and EG piles. The EG pile is then sawed in half in the middle, that is, 4 precast piles with the same length are formed, namely AB piles, CD piles, EF piles and FG piles. The AB piles, CD piles, EF piles and FG piles have the same length and one end has an end plate.

[0083] The precast pile described in the present utility model is a precast pile with an end plate at one end produced by using the production method of the multi-section pile. During the production and demolding of the precast pile in the production method of the multi-section pile, there is no disassembly and assembly of external connectors. Compared with the production of conventional precast piles, there are no new processes and the production efficiency is high.

[0084] It should be understood that although this specification is described according to various embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0085] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present utility model, and they are not intended to limit the protection scope of the present utility model. Any equivalent embodiments or modifications made without departing from the technical spirit of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A combined end plate, characterized in that, The end plate (3) is provided with a first through hole (3-2). The first through hole (3-2) includes a large-diameter section (3-2-1) and a small-diameter section (3-2-2). The sleeve (2) is arranged on one side of the end plate close to the large-diameter section (3-2-1). A stepped hole (2-2) is provided in the sleeve (2), and the stepped hole (2-2) is coaxially arranged with the first through hole (3-2).

2. The combined end plate according to claim 1, wherein The first through hole (3-2) is a countersunk hole, and the first through hole (3-2) communicates with the end plate rib passing groove (3-3) and the end plate rib through hole (3-4).

3. The combined end plate according to claim 2, characterized in that, An axially penetrating sleeve rib passing groove (2-3) is formed on the side surface of the sleeve (2).

4. The combined end plate according to claim 3, characterized in that, The opening direction of the sleeve rib passing groove (2-3) is the same as that of the end plate rib passing groove (3-3).

5. The combined end plate according to claim 2, characterized in that, The sleeve (2) is a cuboid. The sleeve (2) further includes a sleeve rib through hole (2-4) and a sleeve rib passing groove (2-3). The sleeve rib through hole (2-4) and the stepped hole (2-2) communicate through the sleeve rib passing groove (2-3).

6. The combined end plate according to claim 3 or 5, characterized in that The sleeve rib passing groove (2-3) is a stepped groove, including a first stepped stage (2-3-1) and a second stepped stage (2-3-2) close to the end plate side. The width of the first stepped stage (2-3-1) is greater than the width of the second stepped stage (2-3-2).

7. The combined end plate according to claim 6, wherein The height of the first stepped stage (2-3-1) is greater than the height of the steel bar end.

8. The combined end plate according to claim 6, characterized in that, The first stepped surface (2-3-4) between the first stepped stage (2-3-1) and the second stepped stage (2-3-2) is not lower than the second stepped surface (2-2-1) of the stepped hole.

9. The modular end plate according to claim 3 or 5, wherein, The end plate rib passing groove (3-3) is a T-shaped structure.

10. The combined end plate according to claim 1, characterized in that, The sleeve (2) and the end plate (3) are connected by welding or threaded connection or snap connection.

11. The modular end plate according to claim 1, characterized in that, A sleeve positioning groove (3-1) is provided on the end plate (3).

12. A precast pile, characterized in that, At least one end of the pile body of the precast pile is installed with the combined end plate according to any one of claims 1-11.

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